CVE-2021-44776Network attack vector

Unauthenticated KVM rights modification via SubNet_handler_func

Published Oct 24, 2022 · Updated May 7, 2025

Broken access control in spx_restservice on Lanner IAC-AST2500A firmware 1.10.0 allows remote attackers to alter KVM and Virtual Media rights. The SubNet_handler_func request handler applies attacker-supplied security-access changes without enforcing the required access control; further code-level details are undisclosed. Unauthenticated network access to the BMC web application is sufficient, and changed rights can block or improperly grant remote console and media use.

CVSS severity6.5
Medium
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Broken access control in spx_restservice on Lanner IAC-AST2500A firmware 1.10.0 allows remote attackers to alter KVM and Virtual Media rights. The SubNet_handler_func request handler applies attacker-supplied security-access changes without enforcing the required access control; further code-level details are undisclosed. Unauthenticated network access to the BMC web application is sufficient, and changed rights can block or improperly grant remote console and media use.

The record

CVE
CVE-2021-44776
Published
Oct 24, 2022
Updated
May 7, 2025
Vendor
Lanner Electronics Inc
Product
IAC-AST2500A
Classifications
CWE-284, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 24, 2022CVE publishedPublication date reported by the CVE source.
  2. May 7, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.10.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Lanner Electronics Inc · IAC-AST2500Aversion=1.10.0

Published CVSS scores

6.5Nozomi Networks Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo